为解决含钴工业废水的污染问题，实验以热电厂废弃物粉煤灰为吸附剂，采用EDTA滴定法，对含钴废液进行了吸附研究。模拟测定了影响粉煤灰吸附特性的几种因素，即吸附时间、待吸附液pH值、温度、加灰量以及振动速度等，并分析了粉煤灰处理废水的机理。结果显示，在其它条件相同的情况下，随着吸附温度的降低，振荡速率的增加，加灰量的增加，吸附时间的适当延长，pH的升高，去除率逐渐升高。研究表明，采用粉煤灰吸附含钴工业废水，可以得到较好的处理效果，能达到以废治废的目的

In order to solve the problems that arise from industrial draining water taking Co2+, we have investigated and examined the contributing factors to the adsorption efficiency, including the amount of the fly ash to be added to the Co2+-containing solution, pH, the stirring speed, the adsorption time and temperature during the adsorption treatment. It is shown that the adsorption effect of fly ash to Co2+ is surprisingly good. On most occasions in our survey, the Co2+ in the micro liquid waste can be totally adsorbed by certain amount of fly ash under appropriate conditions. With other contributing factors fixed, the adsorption efficiency proves to increase not only with the increase in the stirring speed and the amount of ash added, but also with the decrease of the absorption temperature. In conclusion, the adsorption efficiency can be made desirable by using fly ash under ideal conditions.